Sean Astin and wife Christine welcomed their third child on Friday, PEOPLE has learned exclusively.
Their new daughter, Isabella Louise, was born a month premature, and weighed 5 lbs., 4 oz. However, she was able to join the couple and their two other children, Alexandra, 8, and Elizabeth, 2, at home in Los Angeles the day after she was born.
“Mom and baby are fine and everyone is very happy,” Astin’s rep, David Lust, tells PEOPLE.
Astin, 34, and Christine, 37, both UCLA grads, wed in 1992.